Device for subdividing fused calcium carbide



July 23, 1940. E. WINTER ET AL 2,208,919 I DEVICE FOR SUBDIVIDING' FUSED CALCIUM CARBIDE Fi led May 14, 1957 Ernst Vl/inter,

Franz LzZckerat/z, INVENTORs Paud W l'ndelbqnd; (60116 6/ 1549x245 hrzdelbarzd, fla'hlra'qv THEIR ATTORNEYS Patented July 23, 1940 UNITED STATES.

2,208,919 PATENT OFFICE I 2,208,919 DEVICE ron suamvmmc rcsan CALCIUM cmmr:

Ernst Winter, Cologne-Braunsi'eld, Franz Liickerath, Hermulheim Krels Cologne on the Rhine, and Paul Windelband, deceased, late of Knapsack, near Cologne-oii-the-Ithine,,.Germany, .by Hedi Windelband, administratrix, Wiesbaden, Germany, assignors, by mesne assignments, to I. G. Farbenindustrie Aktlengesellschaft, Frankfort-on-the-Maln, Germany,

a corporation of Germany Application May '14, 1931, 'Serial No. 142,604

The present invention relates to a method for subdividing fusedcalcium carbide and a device blocks become hard at their outer walls relatively" quickly the solidification must proceed throughout before they can be comminuted.

In this manner the energy represented by the heat in the molten calcium carbide leaving the furnace (according to Danneelabout to per cent. of the entire energy used; Ullmann II, 1928, page 1776) is degraded uselessly and at the cost of time and money.- r 1 According to the present invention the liquid calcium carbide is eccentrically cast uponone or several rapidly rotating disks, from which the small particles formed are thrown by centrifugal force against reflectory surfaces surrounding the rotating bodies. These disks are provided with plates which are bent out like flaps from the said disks and act like the'blades of a fan to drawan' inert gas into the machine and to forward it therein. The walls for reflection'surrounding the again. In order to avoid this agglomeration the rotating body are preferably cooled and may have the form of a jacket or thelike.

The invention will befurther explained by reference to the diagrammatically illustrated accompanying drawing in which Fig. 1 is a diagrammatic vertical section through a machine for wpractizing the invention and disk is rapidly rotated by means of the motor (1' as long as the jet of carbide is flowing. Thereby the particles are centrifuged from the disk directly after their formation, and before they can agglomerate strike against a cylindrical wall for reflection e surrounding the disk.- The temperaand leaves at i. e and com-.

Germany May 19, 1936 4 Claims. (Cl. 83-91) ture of this wall is kept at a low degree by-cooling means, for instance by circulation in it of a cooling agent which enters the hollow wall at it Each of the two disks is provided with plates which are bent out like flaps from the said disks insuch a manner as to'act like the blades of a fan and simultaneously to strike the particles of the carbide so as to'promote its commlnution and to throw them against the cylindrical wall The particles deliver the main quantity of their heat to this wall and after having been cooled no longer agglomerate but fall from the vertical wall into a sump ,f and granular size.

In the case of larger furnace units. several disks are preferably arranged one above the other, for instance two disks 0 and d of dilferent diameters, and each disk may be surronded by a cooled wall e for reflection so that the delivery of the heat occurs by degrees. In order to avoid any loss of calcium carbide it is advisable, if possible, to exclude air from the machine for instance by substituting for the air. an inert gas, for instance with nitrogen admitted at k.

agent in counter current to the ,flow of carbide, is drawn into the device and forwarded therein by the plates bent out from the disks.

The invention involves the following advantages:

(1) Omission of the considerable period hitherto necessary for cooling the hot carbide blocks before they can be ground and thereby a simultaneous saving of the large cold stores necessary for cooling the hot blocks.

(2) Delivery of nearly all the heat in the carbide melt leaving the furnaceto the cooling agent of the wall thus recovering this heat in the form, for instance, of hot water.

'(3) Omission or at least a very considerable restriction of the formerly necessary breaking of the very hard solidified particles of calcium carbide. a

(4) Omission of the considerable costs for re;

inert gas, which simultaneously acts as coolingmay now be screened so as to obtain the desired pairs of the hitherto usual machines caused by the high-mechanical strain involved in the crush- We claim:

1. Apparatus for subdividing fused calcium car bide comprising a housing, an inlet for introducing an inert gas into said housing, disks mounted 5 -for rotation in said housing, flap-like plates punched from said disks at points spaced between the center and periphery thereof, said plates being inclined with respect to the disk from which said plates are punched so as to draw the inert 10 gas into the housing and through said disks, at

least some of said plates being upwardly inclined with respect tothe disks, means for supplying fused calcium carbide eccentrically to the upper surfaces of said disks in such a manner as to 15 promote the comminution of said carbide into small. particles and to throw them outward against said housing, portions of the housing being spaced to provide impact surfaces for the material discharged from the disks, means'for g rapidly rotating said disks and means for cooling the walls of said housing.

2. Apparatus for subdividing fused calcium carbide comprising a housing, an inlet for introducing an inert gas into said housing, at least 25 two disks mounted for rotation in said housing,

30 draw the inert gas into the housing and through said disks, at least some of said plates being upwardly inclined with respect to the disk, means for supplying fused calcium carbide 'eccentrically to theupper surfaces of said disks in such a man- 35 ner as to promote the comminution of said carbide into small particles and to throw them outward against said housing, portions of the housing being spaced to provide impact surfaces for the material discharged from the disks, means 40 for rapidly rotating'said disks and means for cooling the walls of said housing.

3. Apparatus for subdividing fused calcium carbide comprising a housing, an inlet for introducing an inert gas into said housing, a coneshaped bottom wall for said housing spaced inwardly from the side walls thereof to provide an outlet from said housing, a shaft extending through said housing and beyond said bottom wall, means located beneath said bottom wall for o rotating said shaft, disks mounted for rotation in said housing, flap-like plates punched from said disks at points spaced between the center and periphery thereof, said plates being inclined with respect to the disk from which said plates are punched so as to draw the inert gas into the housing and through said disks, at least some of said plates being upwardly inclined with respect to the disk, means for supplying fused calcium carbide eccentrically to the upper surfaces of said disks in such a manner as to promote the comminution'of said carbide into small particles and to throw them outward against said housing, portions of the housing being spaced to provide impact surfaces for the material discharge from the disks, means for rapidly rotating said disks and means for cooling the walls of said housing.

4. Apparatus for subdividing fused calcium carbide comprising a housing, an inlet for introducing an inert gas into said housing, two disks mounted above one another for rotation in said housing, the lower disk being of a greater diameter than the upper, flap-like plates punched out from said disks at points between the center and periphery thereof, said plates being inclined with respect to the disk from which the plates are punched so as to draw the inert gas into the housing and through said disks, at least some of said plates being upwardly inclined with respect to the disk, means for supplying fused calcium carbide eccentrially to the upper surface of the upper disk in such a manner as topromote the combination of said carbide into small particles and to throw them outward against said housing, the upper portion of said housing being spaced to provide an impact surface for the material discharged from said upper disk and to allow the carbide particles to drop onto the upper surface of the lower disk in such a manner as to promote further comminution of said carbide irito small particles and to throw them outward against said housing, the portion of the housing face for the material discharged from said disk, means for rapidly rotating said disks and means for cooling the walls of said housing.

ERNST WINTER. FRANZ LiicKERATH. HEDI WINDELBAND, As Administratrim of Pay! Windelband, De-

ceased.

on approximately the same level as said lower disk also being spaced to provide an impact 'sur- 

